You want contained hot aisles or contained cold aisles to maintain maximum efficiency. You want managed airflow.
Its perfectly ok for the hot aisle to be at 100+F. Its also perfectly ok for the cold aisle to be at the mid 70s, as long as there is no stratification or leakage (top of the rack should be within limits). What you want to see is offline CRAHs or VFDs installed in the CRAHs throttling back their airflow.
I work at a company which specializes in monitoring and helping customers improve their capacity and energy use. By placing air where it needs to go you can both cut costs and improve capacity. Sadly, very very few datacenters are run with the efficiency and managed airflow in mind (people even put perforated tiles in the hot aisle!). If you have containment, then you're 95% of the way there. Another more modern option is liquid cooled racks, or in-row cooling (APC Pods and the like).
Amazon also released their downloader (absurdly required for whole albums). Sadly is prepacked for various distributions and no "generic" option, but its a very good step.
I think both of us share the similar approach to style, which is in some ways minimalism. I use both Thinkpads and Macs, and both share the same design ideas. Both utilitarian, without gaudy mirrors or trendy glowing lights. Both are unobtrusive to using the actual computer.
Second the msp430 suggestion. Well worth looking into for micropower embedded applications.
The GCC port (based on 3.2.3) isn't all that great, but it does do the job.
Their consumer quality has nose dived in the last ten years. Cheaper and faster is the name of the game.
I do have some Sony equipment from their "good engineering, built like a tank" era. It sill works great. And it doesn't even restrict its self to mini disc and Beta:).
Verizon has a GREAT network. It really does put other networks to shame.
Their problem is simple: overly locked down useless phones. If Verizon had the iPhone (and not the current BlackBerry Touch, which really is no comparison once you dig beyond the surface), I would still be with Verizon. Sadly, their policy of crippling phones well beyond what any other carrier does finally did it for me.
NetApp also has it for their storage products. Not a new concept I agree. I've seen is used very successfuly for user home directories. This was a bunch of Linux workstations which used NFS for their home directories. There was a background script which would generate snapshots every 5/15/60/120 minutes (plus some at day/week markers, and remove the previous old snapshot) for a thousand users (and FSes). All transparent to the user, and minimal overhead.
It can be useful for allowing a delayed read of a 'clean' table state for a database. It requires some interaction of the DB + the FS layer. Put the database in 'journal only' mode, wait for whatever indicator it provides that the tables are now clean, snapshot, and turn on the table writes again.
This is one way I use of backing up a very large PostgreSQL database. Significantly faster than even attempting to use the builtin dump/restore functionality.
Of course ZFS and other constant time snapshot filesystems suffer from increased disk fragmentation as they're all based on COW. There is some smart math behind them to avoid it as much as possible, however it can still be a problem. Maybe the future of SSDs will make the impact even more minor than it is.
Because having a block based filesystem that has no notion of what the underlying storage is "dumb". ZFS fixes those problems.
Want to create a new filesystem in ZFS? Sure, no problem. You don't even need to specify a size, it will use whatever space the storage pool has available, no pre-allocation needed. How about removing one? Ok, its removed. Yes, it only took a second to do that. A traditional LVM + FS system can't do that - you need to resize, move, and tweak filesystems when doing any of the above operations - time consuming and limited.
And if you're asking why you'd want to create and remove filesystems on the fly, there is one word for that: snapshots. Its quite feasible to generate snapshots many times per day for a ZFS backed fileserver (or even database server). Someone created a file at 9am and then accidentally nuked it before lunch? Don't worry, its still present in the 10am and 11am snapshots. All online, instantly available.
They probably "punch in" on their PC, which is an interesting ploy by the employer. But I agree. The second you're in the door or at your desk, the clock has started. You are "at work".
Yes, that would be my second suggestion. It all depends on the depth and level the original poster is taking it to. If you're going to run out of true beginner stuff, it may be advantageous to work in Dive Into Python (maybe select your own pieces into a course reader type of book).
Check out the "Network Addon Mod"
http://www.simtropolis.com/modding/index.cfm?p=details&id=380
It extends the transportation as much as possible through creative tiles, and even tweaks some of the parameters in the route finding algorithms. HIGHLY recommended. Granted, some of the new tiles are annoying to use (especially the piece wise ones you can't drag and must place tile by tile). But you can actually now place El trains over roads, and other such odd omissions from the original sim city.
ABS is more often than not a liability in snowy situations. When there is near-0 traction to the road surface, being able to lock your wheels to generate some braking force (such as a snow dam) is beneficial.
And even with ABS, steering while moving in snow is very difficult.
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You mean like DNS?
My Quadro based laptop with the NVidia driver has no issues with suspending and hibernating, and runs generally flawlessly.
You want contained hot aisles or contained cold aisles to maintain maximum efficiency. You want managed airflow.
Its perfectly ok for the hot aisle to be at 100+F. Its also perfectly ok for the cold aisle to be at the mid 70s, as long as there is no stratification or leakage (top of the rack should be within limits). What you want to see is offline CRAHs or VFDs installed in the CRAHs throttling back their airflow.
I work at a company which specializes in monitoring and helping customers improve their capacity and energy use. By placing air where it needs to go you can both cut costs and improve capacity. Sadly, very very few datacenters are run with the efficiency and managed airflow in mind (people even put perforated tiles in the hot aisle!). If you have containment, then you're 95% of the way there. Another more modern option is liquid cooled racks, or in-row cooling (APC Pods and the like).
Amazon also released their downloader (absurdly required for whole albums). Sadly is prepacked for various distributions and no "generic" option, but its a very good step.
I think both of us share the similar approach to style, which is in some ways minimalism. I use both Thinkpads and Macs, and both share the same design ideas. Both utilitarian, without gaudy mirrors or trendy glowing lights. Both are unobtrusive to using the actual computer.
I agree with you, the price premium on the Macintosh gives you a MUCH more usable laptop. The Dell is nothing more than an ugly desktop replacement.
Second the msp430 suggestion. Well worth looking into for micropower embedded applications. The GCC port (based on 3.2.3) isn't all that great, but it does do the job.
"Chassis" is quite a good term. Its the frame on which you attach all the bits.
Depending on what applications you're use, and if you have gnome's FUSE VFS thing running, you can bonk the URL into Nautilus, and its transparent.
I don't use Gnome or KDE however.
Their consumer quality has nose dived in the last ten years. Cheaper and faster is the name of the game. I do have some Sony equipment from their "good engineering, built like a tank" era. It sill works great. And it doesn't even restrict its self to mini disc and Beta :).
Nope :)
Verizon has a GREAT network. It really does put other networks to shame. Their problem is simple: overly locked down useless phones. If Verizon had the iPhone (and not the current BlackBerry Touch, which really is no comparison once you dig beyond the surface), I would still be with Verizon. Sadly, their policy of crippling phones well beyond what any other carrier does finally did it for me.
I'd suggest getting your house on a 3 phase feed, and run 208V everywhere. After all, its how datacenters do it :)
NetApp also has it for their storage products. Not a new concept I agree. I've seen is used very successfuly for user home directories. This was a bunch of Linux workstations which used NFS for their home directories. There was a background script which would generate snapshots every 5/15/60/120 minutes (plus some at day/week markers, and remove the previous old snapshot) for a thousand users (and FSes). All transparent to the user, and minimal overhead.
It can be useful for allowing a delayed read of a 'clean' table state for a database. It requires some interaction of the DB + the FS layer. Put the database in 'journal only' mode, wait for whatever indicator it provides that the tables are now clean, snapshot, and turn on the table writes again.
This is one way I use of backing up a very large PostgreSQL database. Significantly faster than even attempting to use the builtin dump/restore functionality.
Of course ZFS and other constant time snapshot filesystems suffer from increased disk fragmentation as they're all based on COW. There is some smart math behind them to avoid it as much as possible, however it can still be a problem. Maybe the future of SSDs will make the impact even more minor than it is.
Want to create a new filesystem in ZFS? Sure, no problem. You don't even need to specify a size, it will use whatever space the storage pool has available, no pre-allocation needed. How about removing one? Ok, its removed. Yes, it only took a second to do that. A traditional LVM + FS system can't do that - you need to resize, move, and tweak filesystems when doing any of the above operations - time consuming and limited.
And if you're asking why you'd want to create and remove filesystems on the fly, there is one word for that: snapshots. Its quite feasible to generate snapshots many times per day for a ZFS backed fileserver (or even database server). Someone created a file at 9am and then accidentally nuked it before lunch? Don't worry, its still present in the 10am and 11am snapshots. All online, instantly available.
They probably "punch in" on their PC, which is an interesting ploy by the employer. But I agree. The second you're in the door or at your desk, the clock has started. You are "at work".
Yes, that would be my second suggestion. It all depends on the depth and level the original poster is taking it to. If you're going to run out of true beginner stuff, it may be advantageous to work in Dive Into Python (maybe select your own pieces into a course reader type of book).
In the age of auto MDI/MDIX, who uses crossover cables anymore? ;)
http://www.greenteapress.com/thinkpython/.
Its a great introductory programming book, focused on Python. Its coming out in print form soon, if that is a requirement.
But good does not equal not annoying :)
ZFS does maintain ECC codes to aid in correction. Even on single disks.
Sadly yes. I find myself playing "SimRoad" more than SimCity myself :)
Check out the "Network Addon Mod" http://www.simtropolis.com/modding/index.cfm?p=details&id=380 It extends the transportation as much as possible through creative tiles, and even tweaks some of the parameters in the route finding algorithms. HIGHLY recommended. Granted, some of the new tiles are annoying to use (especially the piece wise ones you can't drag and must place tile by tile). But you can actually now place El trains over roads, and other such odd omissions from the original sim city.
ABS is more often than not a liability in snowy situations. When there is near-0 traction to the road surface, being able to lock your wheels to generate some braking force (such as a snow dam) is beneficial. And even with ABS, steering while moving in snow is very difficult.
Or the modern replacement, InDesign.